Cylinder lock for sliding doors



July 15, 1958 w. J. DUVALL CYLINDER LOOK FOR SLIDING nooRs 3 Sheets-Sheet 1 Filed Nov. 18, 1955 INVENTOR. WALTER J. DUVALL HIS ATTORNEY July 15, 1958 w. J. DUVALL CYLINDER LOCK FOR SLIDING DOORS 3 Sheets-Sheet 2 Filed Nov. 18, 1955 FIG.8

FIG. 9 FIG. IO

IINVENTOR. WALTER J. DUVALL (Baa/( Q. w

HIS ATTORNEY FIG. l5

FIG. ll

FlG. I4 I July 15, 1958 w. J. DUVALL CYLINDER LOCK FOR SLIDING DOORS 5 Sheets-Sheet 3 Filed NOV. 18. 1955 [1 J I2 I WALTER J. DUVALL INVENTOR.

BYUM W\ HIS ATTORNEY This invention relates to a lock for'sliding doors.

It is an object of my invention to provide alock for sliding doors, which is adapted to be operated by a conventional cylinder lock. It is a further object of my invention to provide such a lock which will fit any size of sliding door from 1 wide to one 1%" wide.

It is particularly an object of my invention to provide a locking mechanism which is complete except for the cylinder itself and which is adapted to receive and operatewith any conventional lock cylinder. In this way, theuowne'r or builder may use anylock which he desires and-thekeying of my sliding door lock can be made the same'asuthatof any other locks used in the house. Another object of my invention is to provide such a lock-.me'chanis'rn in which key operation is provided for one side. and manual operation (or none) for the other'side, with the lock being completely reversible so thatthe key control may be'placed on either side of thelock, as desired and determined by the user at the time of installation;

A further object of myv invention is to provide such a'lock: which is capable of being set to locked position when the dooris open, but which does not actually become locked until it engages 'a strike upon the door being closed; My lock cannot be damaged by closing the door while the lock isset in locked position.

Still another object'of my invention is to provide such a 1001? which is adapted to fit within a notch cutin the front edge of a sliding door; My device is mortised into the front edge of the door adjacentthe top and bottom of the notch, so"that the frame of the lock acts to reinforce and restore the strength of the front edge of the door where it has been weakened by the cutting of the notch I V My device is adapted to utilize a conventional cylinder lock and still not interfere with the movement of the door and look into the wall in the manner in which sliding doors are conventionally installed. it further provides an edge pull-for removing the door from the wall and a flush pull for controlling movement of the door thereafter.

It is a further object of my invention to provide a deviceof the-class described which is simple and economical to manufacture and efficient and substantially foolproof in operation.

Myinvention also comprises such other objects, advantages and capabilities as will later more fully appear and which are inherently possessed by my invention.

While I have shown inthe accompanying drawings a preferred embodiment of my invention, it should be understood that the same is susceptible of modification and change without departing from the spirit of my invention.

Referring to the drawings, t

Fig. 1 is a side elevational view of thekey operated sideof my lock;

Fig. 2'is a front elevational view of my lock;

Fig. 3 isa side elevational view of the manual control side of my'lockr United States Patent 0 "ice Fig. 4 is a view of the inside of the'manual control side of my lock;

Fig. 5 is a view of the locking mechanism showing: the cylinder lock control moving the lock to locked position;

Fig. 6 is a view of the locking mechanism in locked position, with the cylinder lock control in normal position;

Pig. 7 is a view of the lock mechanism broken away on both ends to show only the center, in which the cylinder lock control moves the lock to' unlocked position;

Fig. 8 is an enlarged side elevational view of the cylinder lock used with my device;

Fig. 9 is a side elevational view of the lock inlocked position;

Fig. 10' is a side elevational view of the lock in unlocked position;

' Fig. 11' is a side elevational view of the lock operating mechanism in unlocked position,-thefront portion of the figure being shown in section;

Fig. 12 is a sideelevational view'of the lock operating mechanism in locked position, the front portion of the figure being shown'in section;

Fig. 13 is a front elevational view of the lock operating mechanism partly broken away' to show the positioning of the parts;

Fig. 14 is a front elevational view of the top portion of my device in locked position;

Fig. 15 is a front elevational view of the top. portion of-my device in unlocked position;

Fig. 16 is a sectional view of the spring mounting of the edge pull;

Fig. 17 is a rear elevational view of the springmount ing ofthe edge'pulh- V Fig. 18 is a sectional view of the lock in unlocked posi-. tion',

Fig. 19 is a sectional view' of the'loclcinlocked position;

Fig; Zil'is a sectional view of theframe;

Fig. 21 is a front elevational view ofthe frame;' Fig. 22 is a perspective view of the latch; Fig. 23 is a perspective view of the latch retainer.

A preferred embodiment which'has been selected to illustrate my invention comprises a frame 10,-which is.

adapted to be mounted in a notch cut in the front edge of a sliding door. The front of the frame 10 is provided with top and bottom flanges; 11' and'lZ respec-- tively,-which are mortised into the door above and below the notch, with wood screws or other fastening; members extending through openings in the'flanges 11' and 12 into the door. The" sides of the frame 10 are:

enclosed by a pair of rectangular side plates 13 and14,.=

each of which has a central opening which may house a cylinder lock control or othermay be left blank.

Each of the side plates 13 and 14- is provided with four openings adjacent its corners. A pair of screws extends through the front openings into the frame 1010- attach-the side plates 13 and 14 to the frame 10.- Another pair of screws extends through the rear openings into the door behind the notch. The front of the frame 19 is elongated front opening 15, in which; is pivotally mounted an edge pull 16. The edge pull 16 provided with an has a bottom hook'portion transversely within the lower the remaining portion of t to the front of the frame 10, its'front'surface being substantially fiush therewith. The edge poll 16 is held in position by a spring 18 and is adapted to be pivotedoutwardly from the frame 10 for use in moving the door.

17 which normally extends The frame 10 has a removable front plate 16a having and 20. .The front flanges- 21 and 22 side portions 19 of the side plates 13 and14overlap the side portions 19 control means or which part of the frame 16, whilene edge pull 16 extends paralleland 20 to a greater or less extent to permit use of the lock onany size of door from 151 wide to 1%" wide.

Referring to Fig. 4 of the drawings, the side plate 14 is provided with a centrally disposed circular opening, through which extends a circular portion of a control member 23. The control member 23 has a manually rotatable portion disposed on the outside of the side plate 14 which may be grasped by the fingers to cause the control member 23 to rotate. A substantially flat control plate 24 is attached to the control member 23 on the inside of side plate 14, extending parallel thereto. The control plate 24 is provided with a pair of elongated pins 25 and 26, which extend horizontally toward the opposite side plate 13.

The frame is provided with a large opening in the center thereof. Attached to the side of the frame 10 adjacent side plate 13 is a cylinder mounting plate 27, which has an integral circular cylinder mounting ring 28 which is disposed within the opening in the center of the frame 10. A portion of the ring 28 is provided with internal screwthreading which is adapted to receive the complementary external screwthreading 29 on the outside of a conventional mortise lock cylinder 30. A pair of set screws 30a are provided adjacent the sides of the ring 28 and are adapted to fit into the grooves of the cylinder 30 to hold it in proper position.

Rotatably mounted around the periphery of the ring 28 is a locking member 31. The center of the locking member 31 is circular and fits snugly around the periphery The locking member 31 is provided at its top and bottom with a pair of diametrically opposed cams 32, which have elongated openings therein which receive the pins 25 and 26 of the control plate 24.

a notch 33, the sides of which act as a stop for the upper cam 32 to limit the rotational movement of the locking member 31.

The front of the frame 10 is provided with a substantially square opening 40, which is disposed directly above the elongated front opening 15. Mounted directly ,behind the opening 40 is a sliding latch retainer 41. The latch retainer 41 is slidably mounted in a latch retainer slide 42 which is integrally formed within the upper front portion of the frame 10. The latch retainer 41 has a substantially rectangular face plate 43, the front of which faces outwardly toward the front of the frame 10. A pair of integral rightangular porjections 44 and 45 extend rearwardly from the central portion of the face plate 43 adjacent the top and bottom thereof.

The outside of the top projection 44 slides along the top wall of the latch retainer slide 42, while the outside of the bottom projection 45 slides along the bottom wall. The side edges of the face plate 43 slide along the side walls of the latch retainer slide 42. The latch retainer slide 42 is provided with a pair of oppositely disposed flanges 46 and 47, which extend inwardly from its side walls and which are spaced rearwardly from the front of the frame 10. The flanges 46 and 47 are adapted to engage the back of the face plate 43 to limit its rearward movement along the latch retainer slide 42.

The back of the latch retainer slide 42 is provided with a centrally disposed forwardly directed circular pin 48, which is formed integrally with the frame 10. A coil spring 49 is mounted so that one end thereof surrounds and is positioned by the pin 48, while its opposite end engages the rear surface of the face plate 43.

The coil spring 49 thus normally urges the latch retainer 41 toward the front of the frame 10. In use, a strike 70 having a hook on the end thereof is mounted on the door jamb in such position that it will enter the square opening 40 when the door is moved into closed position. As the strike 70 enters the opening 40, it contacts the face plate 43 and moves the latch retainer 41 rearwardly within the frame 10 against the pressure of the coil spring 49. The latch retainer 41 moves rearwardly along the latch retainer slide 42, with the projections 44 and 45 moving above and below the coil spring 49. The latch retainer 41 will continue to move until the rear of the face plate 43 engages the flanges 46 and 47.

The locking action is accomplished by means of an elongated latch 50, which is slidably mounted along the front of the frame 10. The front of the frame 10 is provided with a pair of elongated vertical spring channels 51, which are integrally formed adjacent the opposite sides of frame 10. Mounted in each of the channels 51 is a vertically extending coil spring 52. The bottom ends of the coil springs 52 bear against the bottom of the channels 51, while their upper ends bear against which extend rearwardly from the and which are slidably mounted in the upper ends of the channel 51. The coil springs 52 thus normally urge the latch 50 upwardly toward the top of the frame 10.

The latch 50 is provided adjacent its upper end with a rearwardly directed substantially H-shaped catch member 54. The sides of the catch member 54 are slidably mounted in a catch slide 55 which is disposed directly beneath the latch retainer slide 42 and which is formed as an integral part of the frame 10. The portion of the top of the latch 50 above the center of the catch member 54 is cut away.

In use, the latch retainer 41 and latch 50 are related in the following manner. The bottom of the face plate 43 of the latch retainer 41 normally engages the top of the catch member 54 to prevent upward movement of the slide 50. When the latch retainer 41 is moved rearwardly in the manner previously described, it moves beyond the rear edges of the catch member 54, permitting the coil springs 52 to move the latch 50 upwardly along the front of the frame 10. When this occurs, the center of the latch 50 above the H-shaped contact member 54 moves upwardly from the bottom of the opening 40 and engages the hook of the strike 70. The latch 50 then prevents withdrawal of the strike from the opening 40 to lock the door in closed position.

The return movement of the latch 50 and latch retainer 41 is controlled by a lever arm 56, one end of which is pivotally mounted adjacent the lower rear comer of the frame 10. The opposite end of the lever arm 56 is provided with a ball-shaped portion 57 which is substantially circular in cross section and which fits between a pair of parallel horizontal bosses 58, which extend rearwardly from the back of the latch 50 adjacent the lower end thereof. The upper portion of the lever arm 56 is curved to provide a cam surface 59, which is adapted to be engaged by the curved outer surface of the cams 32 of the locking member 31. I

The locking and unlocking action are controlled through rotational movement of the locking member 31.

end portion 57 downwardly. This moves the latch 50 downwardly to release the strike 70. As the strike is Withdrawn from the opening 40, the coil spring 49 returns the latch retainer 41 to normal position, in which it prevents upward movement of the latch 50.

Movement of the locking member 31 to the position to its normal position for withdrawal from the cylinder 30, the control arm 60 is returned to the position shown in Fig. 6 of the drawings.

As long as the locking member 31 remains in this position, the door cannot be locked. If the door is closed,

causing the strike 70 to enter the opening 40, the. latch retainer 41 will move to released 50 cannot move upwardly because the cam 32 of the locking member 31 prevents upward pivotal movement of the lever arm 56 and thus prevents upward movement of the latch 50.

In order to move the mechanism to locking position, it is necessary to rotate the locking member 31 in the opposite direction. This can be accomplished by manual rotation of the control member 23 or by using the key in the cylinder 30. In the latter case, the control arm 60 is rotated in the opposite direction so that it engages; the opposite side of the lower cam 32 and moves it-to unlock positionas shown in Fig. 7 of the drawings.

If the door is open at the time of this movement, the

lock is cocked and will move into locked position as soon as the door is closed. if the door is already closed, the catch 50 will move upwardly into locked position. In order to prevent the locking member 31 from assuming a position other than the locked and unlocked positions previously described, a locator arm 61 is pivotally mounted in the upper rear portion of the frame 10. The locator arm 61 is roughly L.-shaped, as shown in Figs. 11 and 12 of the drawings. The rear end of locator arm 61 is pivotally attached to the frame It The portion directly above the pivotal attachment extends roughly parallel to the back of the frame 10. A coil spring 62 extends horizontally between the back of the frame and this portion of the locator arm 61. The remaining portion of the locator arm 61 extends substantially horizontally and is provided with a downwardly directed cam portion 63. The free end of the locator arm 61 is disposed adjacent the back of the latch retainer slide 42.

The action of the locator arm 61 can probably best be seen by reference to Figs. 5-7 of the drawings. It will be seen that the cam portion 63 of the locator arm 61 engages one side of the upper cam 32 of the locking member 31. The coil spring 62 exerts pressure which urges the cam 32 and locking member 31 toward a stable locked or unlocked position.

It will be noted that my locking mechanism is completely symmetrical, and is therefore reversible, to permit operation of the cylinder lock from either side. This reversibility can be accomplished without taking the actual locking mechanism apart. Because the locking means travel around the outer diameter of the cylinder lock, simplicity of structure and operation are achieved.

1 claim:

1. A lock mechanism comprising a frame, said frame having a large central opening, means for mounting a lock cylinder within said opening, a locking member rotatably mounted around said cylinder, said locking member being rotatable to a locked and an unlocked position, said locking member having a pair of diametrically opposed cams disposed adjacent the periphery of said cylinder, said cylinder having a rotatable control arm, said control arm adapted to extend beyond the periphery of said cylinder to engage the adjacent cam and move said locking member to locked or unlocked position, said cylinder being reversible with respect to said frame.

2. The structure set forth in claim 1 and a manual control member accessible from the outside of the frame, each of said cams having an opening therein, said control member having a pair of pins extending into said openings, said control member adapted upon rotation thereof to rotate said locking member to locked or unlocked position.

3. A lock mechanism comprising a frame, said frame having a large central opening, means for mounting a lock cylinder within said opening, a locking member rotatably mounted around said cylinder, said locking member being rotatable to a locked and an unlocked position, said locking member having a cam disposed adjacent the periphery of said cylinder, said cylinder position, but the latch said locking member having a rotatable control arm, said control arm adapted to extend beyond the periphery of said' cylinder to engage said cam and move said locking member to locked or unlocked position, a latch slidably mounted within saidfrarne, first springmeans located within said frame between said latch and frame so as to normally move said latch toward closed position, a latch retainer slidably positioricdwithin said frame, second spring means located within-said frame normally urging said latch retainer into an extended position wherein said latch retainer is capable of limiting the movement of said latch toward said closed position, said latch retainer adapted to be moved from said' extended position topermit movement of said latch to closed position, means located within said frame for moving said latch from said closed position back to a position where its movement is limited by said latch retainer, said means including a lever arm pivotally mounted within said housing and operatively connected to said latch, said frame having an opening adjacent said latch retainer to permit the entry of a hook into said frame, said hook adapted to move said latch retainer from extended position against the pressure of said second spring means, said latch thereupon adapted to be moved to closed position by said first spring means to engagesaid hook, said latch adapted to be disengaged from said book by pivotal movement of said lever arm, said cam adapted to control movement of said lever arm.

4. A lock mechanism comprising a frame, said frame having a large central opening, means for mounting a lock cylinder within said opening, a locking member rotatably mounted around said cylinder, said locking member being rotatable to a locked and an unlocked position, having a cam disposed adjacent the periphery of said cylinder, said cylinder having a rotatable control arm, said control arm adapted to extend beyond the periphery of said cylinder to engage said cam and move said locking member to locked or unlocked position, means forming a latch slide within said frame, a latch positioned within said latch slide and adapted to slide along said latch slide from an open position to a closed position, spring means located within said frame between said latch and frame so as to normally hold said latch in closed position, a lever arm pivotally mounted within said frame, said lever arm engaging said latch and adapted to slide said latch within said frame from said closed position to said open position against the pressure of said spring means when said control arm is pivoted, said cam adapted when moved from locked to unlocked position to engage said lever arm to cause said lever arm to pivot and move said latch from closed to open position, said cam adapted to prevent the reverse pivotal movement of said lever arm when engaged therewith and to permit said movement when not in engagement therewith.

5. A lock mechanism comprising a frame, said frame having a large central opening, means for mounting a lock cylinder within said opening, a locking member rotatably mounted around said cylinder, said locking member being rotatable to a locked and an unlocked position, said locking member having a cam disposed adjacent the periphery of said cylinder, said cylinder having a rotatable control arm, said control arm adapted to extend beyond the periphery of said cylinder to engage said cam and move said locking member to locked or unlocked position, means forming a latch slide within said frame, a latch positioned within said latch slide and adapted to slide along said latch slide from an open position to a closed position, a lever arm pivotally mounted within said frame, said lever arm engaging said latch and adapted to slide said latch within said frame from said closed position to said open position when said control arm is pivoted; said cam adapted when moved from locked to unlocked position to engage said lever arm to cause said lever arm to pivot and move said latch from closed to open position, said cam adapted to prevent the reverse pivotal movement of said lever arm when engaged therewith and to permit said movement when not in engagement therewith.

6. A lock mechanism comprising a frame, said frame having a large central opening, means for mounting a lock cylinder within said opening, a locking member rotatably mounted around said cylinder, said locking member being rotatable to a locked and an unlocked position, said locking member having a cam disposed adjacent the periphery of said cylinder, said cylinder having a rotatable control arm, said control arm adapted to extend beyond the periphery of said cylinder to engage said cam and move said locking member to locked or unlocked position, a lever arm pivotally mounted 15 2,793,896

Within said frame, said cam adapted when moved from References Cited in the file of this patent UNITED STATES PATENTS 956,000 Teich Apr. 26, 1910 1,434,513 Voight Nov. 7, 1922 1,523,346 Murmann Jan. 13, 1925 2,744,406 Labrie May 8, 1956 Duvall May 28, 1957 

